Buggy code:
public class SQLChar extends DataType implements StreamStorable , StringDataValue { protected static final int RETURN_SPACE_THRESHOLD = 4096 ; private static final int GROWBY_FOR_CHAR = 64 ; private static final char [ ] BLANKS = new char [ 40 ] ; private static void appendBlanks ( char [ ] ca , int offset , int howMany ) { } public boolean getBoolean ( ) throws StandardException { } public byte getByte ( ) throws StandardException { } public short getShort ( ) throws StandardException { } public int getInt ( ) throws StandardException { } public long getLong ( ) throws StandardException { } public float getFloat ( ) throws StandardException { } public double getDouble ( ) throws StandardException { } public int typeToBigDecimal ( ) throws StandardException { } public Date getDate ( Calendar cal ) throws StandardException { } public static Date getDate ( Calendar cal , String str , LocaleFinder localeFinder ) throws StandardException { } public Time getTime ( Calendar cal ) throws StandardException { } public static Time getTime ( Calendar cal , String str , LocaleFinder localeFinder ) throws StandardException { } public Timestamp getTimestamp ( Calendar cal ) throws StandardException { } public static Timestamp getTimestamp ( Calendar cal , String str , LocaleFinder localeFinder ) throws StandardException { } public Object getObject ( ) throws StandardException { } public InputStream getStream ( ) throws StandardException { } public int getLength ( ) throws StandardException { } public String getTypeName ( ) { } public String getString ( ) throws StandardException { } public char [ ] getCharArray ( ) throws StandardException { } public InputStream returnStream ( ) { } public final void setStream ( InputStream newStream ) { } public void loadStream ( ) throws StandardException { } public int getTypeFormatId ( ) { } public boolean isNull ( ) { } public void writeExternal ( ObjectOutput out ) throws IOException { } public void readExternalFromArray ( ArrayInputStream in ) throws IOException { arg_passer [ 0 ] = rawData ; <START_BUG> rawLength = in . readCloudscapeUTF ( arg_passer ) ; <END_BUG> rawData = arg_passer [ 0 ] ; value = null ; stream = null ; intArray = null ; intLength = 0 ; cKey = null ; } char [ ] [ ] arg_passer = new char [ 1 ] [ ] ; public void readExternal ( ObjectInput in ) throws IOException { } protected int growBy ( ) { } public void restoreToNull ( ) { } public boolean compare ( int op , DataValueDescriptor other , boolean orderedNulls , boolean unknownRV ) throws StandardException { } public int compare ( DataValueDescriptor other ) throws StandardException { } public Object cloneObject ( ) { } public DataValueDescriptor getClone ( ) { } public DataValueDescriptor getNewNull ( ) { } public final void setValueFromResultSet ( ResultSet resultSet , int colNumber , boolean isNullable ) throws SQLException { } public final void setInto ( PreparedStatement ps , int position ) throws SQLException , StandardException { } public SQLChar ( ) { } public SQLChar ( String val ) { } public void setValue ( String theValue ) { } public void setValue ( boolean theValue ) throws StandardException { } public void setValue ( int theValue ) throws StandardException { } public void setValue ( double theValue ) throws StandardException { } public void setValue ( float theValue ) throws StandardException { } public void setValue ( short theValue ) throws StandardException { } public void setValue ( long theValue ) throws StandardException { } public void setValue ( byte theValue ) throws StandardException { } public void setValue ( byte [ ] theValue ) throws StandardException { } public void setBigDecimal ( Number bigDecimal ) throws StandardException { } public void setValue ( Date theValue , Calendar cal ) throws StandardException { } public void setValue ( Time theValue , Calendar cal ) throws StandardException { } public void setValue ( Timestamp theValue , Calendar cal ) throws StandardException { } private void formatJDBCDate ( Calendar cal , StringBuffer sb ) { } private void formatJDBCTime ( Calendar cal , StringBuffer sb ) { } public final void setValue ( InputStream theStream , int valueLength ) { } public void setObjectForCast ( Object theValue , boolean instanceOfResultType , String resultTypeClassName ) throws StandardException { } protected void setFrom ( DataValueDescriptor theValue ) throws StandardException { } public void normalize ( DataTypeDescriptor desiredType , DataValueDescriptor source ) throws StandardException { } protected void normalize ( DataTypeDescriptor desiredType , String sourceValue ) throws StandardException { } protected final void hasNonBlankChars ( String source , int start , int end ) throws StandardException { } public void setWidth ( int desiredWidth , int desiredScale , boolean errorOnTrunc ) throws StandardException { } public BooleanDataValue equals ( DataValueDescriptor left , DataValueDescriptor right ) throws StandardException { } public BooleanDataValue notEquals ( DataValueDescriptor left , DataValueDescriptor right ) throws StandardException { } public BooleanDataValue lessThan ( DataValueDescriptor left , DataValueDescriptor right ) throws StandardException { } public BooleanDataValue greaterThan ( DataValueDescriptor left , DataValueDescriptor right ) throws StandardException { } public BooleanDataValue lessOrEquals ( DataValueDescriptor left , DataValueDescriptor right ) throws StandardException { } public BooleanDataValue greaterOrEquals ( DataValueDescriptor left , DataValueDescriptor right ) throws StandardException { } public NumberDataValue charLength ( NumberDataValue result ) throws StandardException { } public StringDataValue concatenate ( StringDataValue leftOperand , StringDataValue rightOperand , StringDataValue result ) throws StandardException { } public BooleanDataValue like ( DataValueDescriptor pattern ) throws StandardException { } public BooleanDataValue like ( DataValueDescriptor pattern , DataValueDescriptor escape ) throws StandardException { } public NumberDataValue locate ( StringDataValue searchFrom , NumberDataValue start , NumberDataValue result ) throws StandardException { } public ConcatableDataValue substring ( NumberDataValue start , NumberDataValue length , ConcatableDataValue result , int maxLen ) throws StandardException { } public StringDataValue trim ( int trimType , StringDataValue result ) throws StandardException { } public StringDataValue upper ( StringDataValue result ) throws StandardException { }

Fix:
rawLength = in . readDerbyUTF ( arg_passer ) ;